General

• Berg
• Grainger (* ASU Preferred Supplier)
• McMaster-Carr
• Miki Pulley
• MSC Industrial (* ASU Preferred Supplier)
• Motor System Parts from Radical RC
• Stock Drive Products

Bearings

• igus - plastic bushings, bearings, linear guides, and cable carriers. Samples.
• Kaydon Slewing Bearings
• NSK Motion and Control
• VXB Ball Bearings

Couplings

• ZeroMax Flexible Shaft Couplings

Gears

• Didel
• Pinion Gears from Radical RC
• RushGears.com

Springs

• Smalley
• Small Coil Spring from TheSprinStore.com